Separate TTD dress?

I bought a second dress for my TTD. It was a white bridesmaid dress, and cost around $125 (with shipping to the store~ it was kinda last minute!). I didn't want to use my real dress, because I was having an AHR. Funny thing is, my TTD dress looks better than my real one now, because it was dry-cleaned and looks PERFECT! My real dress had some of the beading come off when it was dry-cleaned for me to wear for the AHR, so I decided against having it dry-cleaned again! It's in a heap in my spare-bedroom (which is supposed to be being turned into a nursery right now!), and my TTD is hanging up nicely in it's dry-cleaning bag!!!!

I was back and forth as to whether I should get a second dress for TTD or not. I have read that the dresses are usually fine afterwards but my dress is white with Teal on it, and I am not sure how the teal will withstand the salt water and being washed. I am having an AHR as well, and want to wear my dress then, so I don't want it wrecked. Finally my Mom suggested making me a light-weight dress that is flowy for the TTD, so that is what I am doing now, and we are going have some teal on it as well. I am soooo excited!!!